کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1176526 | 961857 | 2006 | 6 صفحه PDF | دانلود رایگان |
The utility of polymer standards for the calibration of average molecular mass estimates often is limited by the polydispersity—the breadth of the size distribution—of the standard. Here monodisperse synthetic hyaluronan (or hyaluronic acid [HA]) complexes in the approximately 1- to 8-megadalton (MDa) range were prepared in two steps. First, synchronized stoichiometrically controlled in vitro reactions yielded linear narrow size distribution biotinylated HA chains. Second, streptavidin protein was added at substoichiometric levels to prepare a series of complexes with one, two, three, or four HA chains per streptavidin molecule. The dendritic-like molecules approximate the mobility of natural linear HA chains on agarose gels, making the complexes useful as defined size standards for high-molecular weight HA preparations.
Journal: Analytical Biochemistry - Volume 355, Issue 2, 15 August 2006, Pages 183–188